I spent 3 weeks at Banjapat's place. He was quick to respond and messaged after I checked in to make sure everything was good with the apartment. The apartment was a good size for a solo traveller and the bunk bed was actually very comfortable with comfortable pillow and duvet. I slept well.
The pool is huge and although small, the gym had everything I needed to get a workout in.
It's an older building but the staff does a great job maintaining it and keeping all the common areas clean. For the price an excellent value in Silom. Everything you could want to eat or drink is literally outside the front door and two BTS stations and an MRT station are a short walk away. I'd stay here again.
Tip: Try the amazing bread at the Bakery across the street and the coffee stand just to the left of the main entrance has great coffee.